Support

A question, a problem or an idea about Kortalo? Write to us:

Your data stays on your phone: we cannot see it or recover it.

To help us answer, tell us your phone model and the app version (Settings, Version).

Privacy questions: privacy@kortalo.com.

How Kortalo calculates

How does Kortalo count the blade kerf?

The kerf is the width of material the blade turns into dust at each cut. After each piece, the app removes one kerf from the bar, except when the piece uses exactly what remains of the bar: no cut is needed then. The last kerf may use up exactly the rest of the bar.

What the app does not do The app uses the kerf you choose for the group. It does not measure your blade and does not model a blade that drifts or wears.

What are end preparations A and B?

Preparation is the total length removed at end A and at end B of a bar before using it, for example a damaged end or a square cut. Usable length = raw length − preparation A − preparation B. Enter the total removed, saw cut included: the blade must not be counted twice.

What the app does not do The two ends must leave something: their sum must stay under the raw length. The app assumes what remains after preparation is usable and models no defect inside a bar.

Why put pieces in separate groups?

A group gathers pieces cut from the same material, for example the same section and species. Each group is calculated on its own: a piece is never cut from a bar of another group. Each group has its own bars you own, offcuts and purchases.

What the app does not do The section is only a note for you: it does not change the calculation, and the app does not check that two groups really are different materials. A piece’s length is the finished piece, not a running total measured from a mark.

What is the difference between the two calculation goals?

“Fewest bars to buy” compares plans first by the number of new bars, then by the total raw length of the bars used, then by the number of cuts. “Lowest purchase cost” compares first by the extra purchase cost (what you already own costs nothing), then by the number of new bars, the raw length used and the number of cuts. The cost goal needs a price on every purchase option. When both goals give the same plan, only one plan is shown.

Is the plan shown always the best possible?

The search is bounded, so a plan is “the best the app found”. A plan is presented as the best possible only when the Results screen says so (“Impossible with fewer bars”). The app does not measure working time or the value of material you own.